Instructions - Parts List Leak Detection System 311200A For detecting leaks in your diaphragm pump system. Not for use in explosive atmospheres. Part No. 234576 120 psi (0.8 MPa, 8 bar) Maximum Air Input Pressure Important Safety Instructions Read all warnings and instructions in this manual. Save these instructions. See page 2 for Table of Contents. TI6850A Graco Inc. P.O. Box 1441 Minneapolis, MN 55440-1441 Copyright 2005, Graco Inc. is registered to I.S.
Warnings Contents Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3 5 7 7 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Technical Data . . . . . . .
Overview Overview Usage The leak detector monitors air operated double diaphragm pumps for diaphragm rupture or other leaks that may contaminate the fluid being pumped. The system is made up of a main control box and two liquid detection sensors. The sensors are screwed into the air side of each diaphragm on the pump. When liquid is sensed by either one of the sensors, an alarm will sound, indicating a diaphragm rupture has occurred.
Overview Control Box Sensors (234789) TI6850A FIG.
Installation Installation 1. Mount the leak detector box in a convenient location. 6. The control box can be powered by 230 VAC, 110 VAC, or 24 VDC. 2. Remove plugs from the pump, if plugs are present. AC power is connected to J6 on the circuit board. The ground connection is the pin between the pins N and 110. See FIG. 6. 3. Remove the sensor covers. Connect the leak detector to the pump by screwing the sensors into the pump. Use thread sealant, as needed. See FIG. 5. a.
Installation Typical Installation Sensors TI6851A FIG. 5 Terminal Connections J3 (Sensor 1) J5 (Sensor 2) J1 (24 VDC) J6 (Line Voltage) Relay J4 (Relay) FIG. 6 Grounding 1. Follow the instructions in your pump manual to ground the Graco diaphragm pump system and check its electrical grounding continuity. 2. When the Leak Detector is powered by 230 VAC or 110 VAC, ground the Leak Detector by connecting the ground wire to terminal G on terminal J6. See FIG. 6.
Operation Operation Leak Detector Operation During normal operation, the LED on the leak detector control box and the sensors will flash once per second. If an error or a diaphragm rupture occurs, the LED and sensors will flash three times per second and the alarm will sound. The relay will trip and change state. To stop the alarm, press the reset button or remove power for 30 seconds. See FIG. 7. LED Reset Button TI6850A FIG.
Troubleshooting Troubleshooting Problem Light flashes 3/sec and alarm sounds 1/sec. Cause Sensor has detected liquid. Solution Determine which sensor has detected the liquid. Inspect the diaphragm on the side which liquid has been detected. Replace diaphragm as necessary. To assure proper sensor operation, clean and dry the sensor head and the air side of the diaphragm pump. Light flashes 3/sec and alarm sounds 3/sec. One of the sensors is unplugged or has failed.
Technical Data Technical Data Input voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-28 VDC 100-130 VAC, 50/60 Hz 190-260 VAC, 50/60 Hz Maximum power consumption . . . . . . . . . . . . . . . . . . . . . 3 W Relay contact rating, 230 VAC . . . . . . . . . . . . . . . . . . . . . 60 W, 62.5 VA Maximum sensor pressure . . . . . . . . . . . . . . . . . . . . . . . . 200 psi (1.4 MPa, 14 bar) Operating temperature range . . . . . . . . . . . . . . . . . . . . . .
Graco Standard Warranty Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in material and workmanship on the date of sale to the original purchaser for use. With the exception of any special, extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective.
